SU1494097A1

SU1494097A1 - Electrical installation with protection unit of power supply network of coal mine bay

Info

Publication number: SU1494097A1
Application number: SU874253883A
Authority: SU
Inventors: Александр Иванович Пархоменко; Анатолий Иванович Плетнев
Priority date: 1987-04-29
Filing date: 1987-04-29
Publication date: 1989-07-15

Abstract

Изобретение относитс к электротехнике и предназначено дл использовани в подземных сет х электроснабжени угольных шахт. Цель изобретени - повышение быстродействи при отключении токов короткого замыкани и повышение безопасности работ в угольных шахтах с внезапными выбросами угл и газа. При нормальном режиме работы сети электроснабжени угольной шахты на выводах вторичной обмотки трансформатора 1 имеетс номинальное напр жение, высоковольтный коммутационный аппарат 2 включен, короткозамыкатели 3 и 6 включены, на выходе блоков 4, 5 защиты аварийные сигналы отсутствуют. При возникновении короткого замыкани между вторичной обмоткой трансформатора 1 и шахтным токоприемником или утечек на землю срабатывают блоки 4, 5 защиты, включа короткозамыкатели 3, 6 и отключа высоковольтный коммутационный аппарат 2. Врем подпитки током зоны короткого замыкани определ етс при этом наименьшим временем включени короткозамыкател 3 или 6. 1 ил.The invention relates to electrical engineering and is intended for use in underground power supply networks of coal mines. The purpose of the invention is to increase speed when switching off short-circuit currents and improving the safety of work in coal mines with sudden emissions of coal and gas. Under normal operation of the coal mine power supply network, the secondary winding of transformer 1 has a nominal voltage, a high-voltage switching device 2 is turned on, short connectors 3 and 6 are turned on, and there are no alarms at the output of protection blocks 4, 5. In the event of a short circuit between the secondary winding of the transformer 1 and the mine current collector or leakage to ground, protection blocks 4, 5 are triggered, including short circuits 3, 6 and switching off the high-voltage switching device 2. At the same time, the shortest turn-on time of the short circuit 3 is activated or 6. 1 ill.

Description

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Изобретение относитс к электротехнике и предн ззначено дл использовани в подземных сет х электроснабжени угольных шахтThe invention relates to electrical engineering and is intended for use in underground power supply networks of coal mines.

Цель изобретени - повьгаение быстродействи при отключении токов короткого замыкани и повышение безопасности работ в угольных шахтах с внезапными выбросами угл и газа. The purpose of the invention is povigeniya speed when switching off short-circuit currents and improving the safety of work in coal mines with sudden emissions of coal and gas.

На чертеже представлена схема энергоагрегата оThe drawing shows a diagram of the power unit

Энергоагрегат сети электроснабжени участка угольной шахты содержитThe power unit of the power supply network of the coal mine site contains

силовой трансформатор I, высоковольт- is При возникновении токов замыкани ный коммутационный аппарат 2,первый (утечек) на землю во вторичной обиpower transformer I, high-voltage -when the occurrence of currents, a closed switching device 2, the first (leakage) to the ground in the secondary obi

Короткозамыкатель 3 и блоки 4 и 5 защиты . Выводы фаз первичной обмотки трансформатора 1 соединены с первыми силовыми выводами высоковольтного коммутацио нного аппарата 2, вторые силовые вьшоды которого служат дл подключени к фазам первой питающей сети. К выводам фаз вторичной обмотки трансформатора 1, служащим дл подключени к сети электроснабжени участка угол1 ной шахты, подключены силовые выводы первого короткозамыкател 3. Управл ющие входы высоковольтного коммутационного аппарата 2 и короткозамыкател 3 соединены с выходами блоков 4 и 5 защиты,входами подключенных к вторичной силовой цепи трансформатора 1« В энергоагрегате имеетс второй Короткозамыкатель 6, силовые выводы которого подключены к выводам фаз первичной обмотки трансформатора 1, а управл ющий вход к выходу блоков 4 и 5 защитыShort circuit 3 and blocks 4 and 5 protection. The phases of the primary winding of the transformer 1 are connected to the first power terminals of the high-voltage switching device 2, the second power outputs of which are used to connect to the phases of the first mains supply. The terminals of the phases of the secondary winding of the transformer 1, which are used to connect to the power supply network of the corner mine section, are connected to the power terminals of the first short circuit 3. The control inputs of the high voltage switching device 2 and short circuit 3 are connected to the outputs of the protection blocks 4 and 5, the inputs connected to the secondary power transformer 1 circuit. "In the power unit there is a second short circuiter 6, the power terminals of which are connected to the terminals of the phases of the primary winding of the transformer 1, and the control input to the output of the block 4 and 5 the protection

Блок 4 защиты может представл ть собой блок максимально-токовой защиты , подключаемый к вторичной силовой цепи трансформатор 1 через трансформаторы 7 тока Блок 5 защиты может быть выполнено в виде реле утечкиThe protection unit 4 may be a overcurrent protection unit connected to the secondary power circuit of the transformer 1 through the current transformers 7 The protection unit 5 may be implemented as a leakage relay

Энергоагрегат работает следующим образомThe power unit works as follows

При нормальном режиме работы се-г ти электроснабжени участка угольной шахты на выводах вторичной обмотки трансформатора 1 имеетс номинальное напр жение, высоковольтный коммутационный аппарат 2 включен,короткозамыкатели 3 и 6 выключены, на выходах блоков 4 и 5 запщты аварийные сигналы отсутствуют. В случае возникновени короткого замыкани между вторичной обмоткой трансформамотке трансформатора 1 или во всей вторичной сети электроснабжени срабатывает блок 5 защиты (реле утечкиUnder normal operation of the electricity supply section of the coal mine section, the secondary winding of transformer 1 has a nominal voltage, the high-voltage switching device 2 is turned on, short connectors 3 and 6 are turned off, there are no alarms at the outputs of blocks 4 and 5. In the event of a short circuit between the secondary winding of the transformer 1 transformer 1 or in the entire secondary power supply network, the protection unit 5 is activated (leakage relay

20 включа короткозамыкатели 3 и 6 и отключа высоковольтный коммутационный аппарат 2о20 including shorting 3 and 6 and disconnecting the high-voltage switching device 2o

Изобретение обеспечивает повьш1е- ние быстродействи при отключенииThe invention provides improved speed when disconnecting

25 токов короткого замыкани и безопасности работ в шахтах с внезапными выбросами угл и газа25 short-circuit currents and mine safety with sudden coal and gas emissions

Claims

Formula of gain

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Power unit of the power supply network of a coal mine site with protection blocks containing a power transformer, high-voltage switching

The first device, the first short circuit breaker, the phase terminals of the primary winding of the transformer are connected to the first power voltages of the high-voltage switching device, the second power circuits of which serve to connect the phases of the secondary winding of the transformer used to connect the power supply network of the coal mine, the power terminals of the first short-circuit are connected, and the control inputs of the high-voltage switching device and the short-circuit are connected to Exit protection units, connected to inputs of the transformer secondary circuit, characterized in that, in order povsh1eni performance when disconnecting a short circuit currents and safety in mines with sudden release E coal and gas introduced into it the second short-circuiting, power vsho

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torus 1 and the mine current collector, the block A of overcurrent protection is activated: it includes short circuitors. 3, 6 and disconnects the high-voltage switching device 2, affecting its control electromagnet. The short-circuit zone is energized by the shortest turn-on time of short circuit 3 or 6. Short circuit 3 eliminates the influence of residual EMF from electric motors on the short circuit in the secondary power supply network

the coil of the transformer 1 or in the entire secondary power supply network, the protection unit 5 (leakage relay) is activated,

including shorting 3 and 6 and disconnecting the high voltage switching device 2o

The invention provides improved speed when disconnecting

short-circuit currents and mine safety with sudden coal and gas emissions

Formula of gain

The power unit of the power supply network of the coal mine section with protection blocks containing a power transformer, a high-voltage switching device, the first short circuit coupler, and the terminals of the transformer primary winding are connected to the first power wires of the high-voltage switching device, the second power cables of which are used to connect to the phases of the primary power network. The phases of the secondary phases of the transformer, serving to connect to the power supply network of the coal mine, are connected with The first pins of the first short circuit and the control inputs of the high-voltage switching device and short circuit are connected to the outputs of the protection units connected to the secondary power circuit of the transformer, in order to improve speed when the short-circuit currents are disconnected and to ensure the safety of work in shafts with sudden emissions of coal and gas, the second Shortcutter is introduced into it, power

51A94P976

The ports of which are connected to the outputs of the phases of the control input - to the outputs of the transformer primary winding blocks, and the protection.